On Fri, Aug 2, 2019 at 11:14 AM Jeff Layton <jlayton@xxxxxxxxxx> wrote:
>
> Prevent freezing operations during write page faults. This is good
> practice for most filesystems, but especially for ceph since we're
> monkeying with the signal table here.
>
> Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
> ---
> fs/ceph/addr.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
> index 563423891a98..731d96f8270d 100644
> --- a/fs/ceph/addr.c
> +++ b/fs/ceph/addr.c
> @@ -1548,6 +1548,7 @@ static vm_fault_t ceph_page_mkwrite(struct vm_fault *vmf)
> if (!prealloc_cf)
> return VM_FAULT_OOM;
>
> + sb_start_pagefault(inode->i_sb);
> ceph_block_sigs(&oldset);
>
> if (ci->i_inline_version != CEPH_INLINE_NONE) {
> @@ -1622,6 +1623,7 @@ static vm_fault_t ceph_page_mkwrite(struct vm_fault *vmf)
> ceph_put_cap_refs(ci, got);
> out_free:
> ceph_restore_sigs(&oldset);
> + sb_end_pagefault(inode->i_sb);
> ceph_free_cap_flush(prealloc_cf);
> if (err < 0)
> ret = vmf_error(err);
> --
> 2.21.0
>
Reviewed-by
